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m_a_m_a [10]
2 years ago
14

Sabah has $450 to pay for college textbooks. She expects to pay about $75 per book. Her friend told her that 4 of them can be ch

ecked out of the library for free.
Complete the equation below to find the total number of books that Sabah can get for her classes. Use b to represent the total books.

The equation has to look like this format: ?(?-?)=?
You can use any of these numbers to fill in the equation: 4, 10, 75, 300, 450, b
Mathematics
2 answers:
DerKrebs [107]2 years ago
7 0
B is the number of books.
She does not have to pay for 4 books, so the number of books she will pay for is b - 4.
Each book costs $75, so b - 4 books cost 75(b - 4).

75(b - 4) = 450
prohojiy [21]2 years ago
6 0

Answer:

B

Step-by-step explanation:

The answer would be

75 (b - 4) = 450


Hope I made your day a little better and I hope I helped !!

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Viktor [21]

The bearing of the tree from Q is 296.565°

<h3>How to determine the height of the tree?</h3>

The figure that illustrates the bearing and the distance is added as an attachment

The given parameters are:

Base of the tree, b = 50 meters

Angle (x) = 32 degrees

Calculate the height (h) of the tree using:

tan(x) = height/base

So, we have:

tan(32°) = h/50

Make h the subject

h= 50 × tan(32°)

Evaluate

h = 31.24

Hence, the height of the tree is 31.24 meters

<h3>How to determine the distance between Q and the base of the tree?</h3>

The distance (d) between Q and the base of the tree

This is calculated using the following Pythagoras theorem

d = √(100² + 50²)

Evaluate

d = 111.80

Hence, the distance between Q and the base of the tree is 111.80 meters

<h3>How to determine the angle of elevation?</h3>

The angle of elevation (x) using the following tangent trigonometric ratio

tan(x) = h/d

This gives

tan(x) = 31.24/111.80

Evaluate the quotient

tan(x) = 0.2794

Take the arc tan of both sides

x = 15.61

<h3>The bearing of the tree from Q </h3>

This is calculated using:

Angle of bearing = 270 + arctan(50/100)

Evaluate the arc tan

Angle of bearing = 270 + 26.565

Evaluate the sum

Angle of bearing = 296.565

Hence, the bearing of the tree from Q is 296.565 degrees

Read more about bearings at:

brainly.com/question/24142612

#SPJ1

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